Home / 1,187,578.35-1,638,861.62-643,716.30

Finding the Fourth Proportional to 1,187,578.35, 1,638,861.62 and 643,716.30

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Solution

The fourth proportional to 1,187,578.35, 1,638,861.62 and 643,716.30 is: 888,330.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,578.35 : 1,638,861.62 = 643,716.30 : x
  2. Step 2: Convert to fraction form
    1,187,578.35/1,638,861.62 = 643,716.30/x
  3. Step 3: Cross multiply
    1,187,578.35x = 1,638,861.62 × 643,716.30
  4. Step 4: Simplify right side
    1,187,578.35x = 1,054,961,938,238.41
  5. Step 5: Solve for x
    x = 1,054,961,938,238.41/1,187,578.35
  6. Step 6: Final answer
    x = 888,330.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.